Cita APA (7th ed.)

Richards, I. A., & Gibson, C. (1945). Learning basic English: A practical handbook for English-speaking people. Norton.

Cita Chicago (17th ed.)

Richards, Ivor Armstrong, i Christine Gibson. Learning Basic English: A Practical Handbook for English-speaking People. New York: Norton, 1945.

Cita MLA (9th ed.)

Richards, Ivor Armstrong, i Christine Gibson. Learning Basic English: A Practical Handbook for English-speaking People. Norton, 1945.